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|caption=Tektronix 3T77A front | |caption=Tektronix 3T77A front | ||
|designers=Bob Webb; Jim Geddes; Cliff Moulton | |designers=Bob Webb; Jim Geddes; Cliff Moulton | ||
|introduced= | |introduced=1966 | ||
|discontinued=1973 | |discontinued=1973 | ||
|manuals= | |manuals= |